Security Token Service (sts) to the rescue!

The AWS Security Token Service (STS) is a web service that enables you to request temporary, limited-privilege credentials for AWS Identity and Access Management (IAM) users or for users that you authenticate (federated users).

You are going to use AWS STS via the AWS CLI to generate new AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY that is MFA approved so you can get back to stopping matchmaking tickets in Game Lift whenever you feel like it.